Optical head for a videodisc player/recorder

Details Optical head for a videodisc player/recorder Optical head for a videodisc player/recorder

1979-05-10

1981-11-03

Faber, Alan

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 44, 369 93, 369111, 369122, 346 76L, 3581285, 250201, 250578, G11B 714

Patent

active

042989744

ABSTRACT:
An optical head comprising a semiconductor laser array which is used as a light source, and an optical system which guides laser beams from the array to a predetermined recording medium. The beam from one lasing point of the array is modulated by predetermined information and is used as a recording beam, while the beam from another lasing point is continuously oscillated and is used as a playback beam.

REFERENCES:
patent: 3431513 (1969-03-01), Nannichi
patent: 3436679 (1969-04-01), Fenner
patent: 3841733 (1974-10-01), Ebersole
patent: 3866238 (1975-02-01), Monroe
patent: 3969575 (1976-07-01), Gerritsen
patent: 3974327 (1976-08-01), Von Dijk
patent: 4037252 (1977-07-01), Janssen
patent: 4051528 (1977-09-01), Takeda
patent: 4085423 (1978-04-01), Tsunoda
"A Review of the MCA Disco-Vision Systems", by Broadbent, Journal of the SMPTE, Jul. 1974, pp. 554-559.

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